Predictive phase tracking in wireless power delivery environments
Systems and methods are described for receiving wireless power and providing wired power. In some embodiments, a predictive phase estimation apparatus comprises a transceiver module configured to receive a plurality of beaconing signals from a wireless client during a beacon cycle. The predictive phase estimation apparatus also comprises a phase compensation module configured to store the received plurality of beaconing signals, a phase predictor module is coupled to the transceiver module and configured to calculate predictive phases based on the received plurality of beaconing signals and based on beaconing signals received from the wireless client prior to the beacon cycle, and a signal converter coupled to the transceiver module. The signal converter is configured to form transmission signals based on the predictive phases and supply the transmission signals to the transceiver module. The transceiver module also transmits the transmission signals for delivery of wireless power to the wireless client.
1. A controller for a transceiver, the controller comprising:
a phase compensator configured to receive measured phases of signals received by the transceiver from a client device at a time point, or during time period; and
a phase predictor coupled to the phase compensator, and configured to compute predictive phases based at least in part on previously measured phases of signals received by the transceiver from the client device at one or more prior time points, or during at least one prior time period,
wherein the phase compensator is further configured to:
compare the predictive phases to the measured phases;
calculate, based on the predictive phases being compared to the measured phases, an error to be applied to resultant phases for use in transmitting at least one signal from the transceiver to the client device in response to the signals being received by the transceiver from the client device at the time point, or during the time period.
2. The controller of claim 1 further comprising the transceiver coupled to: the phase compensator, and the phase predictor, wherein the transceiver is configured to receive, and measure the phases of, the signals received from the client device:
at the time point, or during the time period; and
at the one or more pior time points, or during the at least one prior time period.
3. The controller of claim 1 , wherein the phase predictor is further configured to compute the predictive phases according to a predicted motion model for the client device.
4. The controller of claim 3 , wherein the predicted motion model for the client device includes: a heuristic model, or a formal model.
5. The controller of claim 1 , wherein the phase compensator is further configured to store the measured phases of signals in a buffer for use by the phase compensator to compare the predictive phases to the measured phases.
6. The controller of claim 1 further comprising a signal converter configured to form, based at least in part on the resultant phases calculated by the phase compensator, the at least one signal.
7. The controller of claim 6 , wherein the signal converter is further configured to form the at least one signal according to a predicted location of the client device.
8. The controller of claim 7 , further comprising the transceiver coupled to the signal converter, wherein the transceiver is configured to transmit the at least one signal to the client device.
9. The controller of claim 8 further comprising at least one antenna coupled to the transceiver, wherein the transceiver is further configured to transmit the at least one signal to the predicted location of the client device via the at least one antenna using beam forming and beam direction.
10. The controller of claim 9 , wherein the at least one antenna includes an antenna array having a plurality of antennas.
11. The controller of claim 1 , wherein the transceiver includes a wireless power transmitter, wherein the at least one signal includes a wireless power signal, and wherein the client device includes a wireless power receiver.
12. A system comprising:
a transceiver configured to receive, and measure phases of, signals from a client device at a time point, or during a time period;
a phase compensator coupled to the transceiver, and configured to receive the measured phases; and
a phase predictor coupled to: the transceiver, and the phase compensator, the phase predictor configured to compute predictive phases based at least in part on previously measured phases of signals received by the transceiver from the client device at one or more prior time points, or during at least one prior time period,
wherein the phase compensator is further configured to:
compare the predictive phases to the measured phases;
calculate, based on the predictive phases being compared to the measured phases, an error to be applied to resultant phases for use in transmitting at least one signal from the transceiver to the client device in response to the signals being received by the transceiver from the client device at the time point, or during the time period.
13. The system of claim 12 , wherein the phase predictor is further configured to compute the predictive phases according to a predicted motion model for the client device.
14. A method of operating a transceiver, the method comprising:
measuring phases of signals received by a transceiver from a client device at a time point, or during a time period;
computing predictive phases based at least in part on previously measured phases of signals received by the transceiver from the client device at one or more prior time points, or during at least one prior time period;
comparing the predictive phases from the computing to the measured phases from the measuring; and
calculating, based on the comparing, an error to be applied to resultant phases for use in transmitting at least one signal from the transceiver to the client device in response to the signals being received by the transceiver from the client device at the time point, or during the time period.
15. The method of claim 14 further comprising filtering, based on the error, outliers to facilitate improvement of an accuracy of the resultant phases.
16. The method of claim 15 , wherein filtering the outliers further facilitates improvement of a reliability of the resultant phases in a low quality signaling environment as between the transceiver and the client device.
17. The method of claim 14 further comprising modifying, based on a result of the comparing, a phase estimation calculation for the measuring.
18. The method of claim 14 further comprising:
determining that the client device has moved; and
updating the resultant phases in response to determining that the client device has moved.
19. The method of claim 14 further comprising tracking a moving client device in a low quality signaling environment as between the transceiver and the client device.
20. The method of claim 14 further comprising tracking a stationary client device while a multipath channel is varying in a low quality signaling environment as between the transceiver and the client device.
21. The controller of claim 1 , wherein:
to receive the measured phases, the phase compensator is further configured to receive the measured phases of signals received by the transceiver from the client device during a beaconing cycle;
to compute the predictive phases, the phase compensator is configured to compute the predictive phases based at least in part on the previously measured phases of the signals received by the transceiver from the client device during at least one prior beaconing cycle; and
to calculate the error, the phase compensator is further configured to calculate, based on the predictive phases being compared to the measured phases, the error to be applied to the resultant phases for use in transmitting the at least one signal from the transceiver to the client device in response to the signals being received by the transceiver from the client device during the beaconing cycle.
22. The controller of claim 21 , wherein, to receive, and measure the phases of, the signals received from the client device, the transceiver is further configured to receive, and measure the phases of, the signals received from the client device during the beaconing cycle and the at least one prior beaconing cycle.
23. The system of claim 12 , wherein:
to receive, and measure the phases, of the signals, the transceiver is further configured to receive, and measure the phases of, the signals from the client device during a beaconing cycle;
to compute the predictive phases, the phase compensator is further configured to compute the predictive phases based at least in part on the previously measured phases of the signals received by the transceiver from the client device during at least one prior beaconing cycle; and
to calculate the error, the phase compensator is further configured to calculate, based on the predictive phases being compared to the measured phases, the error to be applied to the resultant phases for use in transmitting the at least one signal from the transceiver to the client device in response to the signals being received by the transceiver from the client device during the beaconing cycle.
24. The method of claim 14 , wherein:
the measuring comprises measuring the phases of the signals received by the transceiver from the client device during a beaconing cycle;
the computing comprises computing the predictive phases based at least in part on the previously measured phases of the signals received by the transceiver from the client device during at least one prior beaconing cycle; and
the calculating comprises calculating, based on the comparing, the error to be applied to the resultant phases for use in transmitting the at least one signal from the transceiver to the client device in response to the signals being received by the transceiver from the client device during the beaconing cycle.